METHOD
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saute the rice
Place a large saucepan over medium heat. Add the olive oil and the chopped onion. Sauté for 5–8 minutes, until the onion softens and becomes translucent, stirring occasionally. Add the rice and sauté for another 5 minutes.
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cook the risotto
Increase the heat and add the red wine to the rice. Stir and cook for two minutes, allowing the alcohol to evaporate. Add one ladle of stock. Wait until the rice absorbs the liquid before adding the next ladle of stock. Continue this process until the rice is almost cooked, about 14–16 minutes. Be sure to stir regularly. Clean the radicchio, finely chop it, and stir it into the rice.
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finish and serve
Remove the risotto from the heat and add the butter and grated Parmesan, seasoning with salt and pepper to taste if needed. Cover with a lid and let it rest for 3 minutes, then serve. Divide among four plates and finish by sprinkling with walnuts.